Code
B1497
ALFA ROMEO
B — Body
Tailgate anti-theft sensor circuit short to positive
Views:
UK: 3
EN: 6
RU: 5
AI status
Completed
Completed
100%
Causes
- Chafed or pinched wiring harness near tailgate/hinges causing insulation breach to a positive feed
- Corroded or damaged tailgate anti-theft sensor connector with positive feed contacting signal conductor
- Aftermarket accessories or recent repairs incorrectly connected to the tailgate wiring or power feed
- Internal short in the anti-theft sensor (sensor failure)
- Faulty BCM or ground point (rare)
Symptoms
- Fault/warning lamp for anti-theft/tailgate security illuminated
- Unable to arm/disarm tailgate anti-theft correctly
- Tailgate sensor shows constant triggered state or intermittent behavior
- Stored DTC B1497 in BCM memory
- Possible parasitic drain or blown fuse if a hard short exists
What to check
- Retrieve freeze frame and any related codes from BCM and security modules
- Visual inspection of tailgate wiring harness, especially at hinge and body-to-tailgate grommet
- Inspect tailgate anti-theft sensor connector for corrosion, bent pins, or melted plastic
- Check fuses and fusible links related to tailgate/BCM circuits
- Backprobe sensor connector and wiring with ignition ON and tailgate in known positions
- Perform wiggle test on harness while watching live data/voltage and checking for intermittent changes
Signal parameters
- Battery supply voltage (Vbatt) at harness: 11–14.5 V with ignition ON
- Sensor signal line expected: low voltage (near 0–1 V) when returned to ground by BCM or high-impedance when inactive — depends on vehicle design (consult Alfa Romeo wiring)
- With a short-to-positive fault the signal line will read ~Vbatt (≈11–14.5 V) at the sensor connector
- Resistance between signal line and battery positive for a hard short: very low (close to 0 ohm). Normal resistance should be high (kΩ to open) when circuit open
- Resistance from signal to ground normally should be high; a low resistance indicates unintended connection
Diagnostic algorithm
- Read and record fault(s) from BCM and any security modules. Note freeze-frame data and ignition state when fault set.
- Visually inspect tailgate area: harness grommet, hinge area, sensor connector, and route for chafing, corrosion or damage.
- With ignition ON, backprobe the sensor connector: measure voltage on the signal wire. If it reads battery voltage (~11–14.5 V), this confirms a short to positive condition at or upstream of the connector.
- Disconnect the tailgate anti-theft sensor connector. Clear codes, cycle ignition and operate tailgate. If B1497 does not return with the sensor disconnected, the sensor or its connector is likely at fault. If code returns, fault is in harness or BCM.
- If voltage indicates short and persists with connector disconnected, isolate wiring by disconnecting connectors progressively toward the BCM to find the shorted section. Pay special attention to sections that flex (hinge/bellow).
- Perform resistance checks (with battery disconnected): measure resistance between the signal wire and battery positive. Very low resistance indicates direct short. Also check resistance to ground and between neighboring wires for pin-to-pin shorts.
- Repair identified wiring damage (repair or replace section, use new grommets and protective sleeving). Clean or replace corroded connectors and re-pin if required.
- If wiring and connector are good but fault persists, test or replace the anti-theft sensor. If still unresolved, suspect BCM or module wiring and pursue module-level diagnostics or consult Alfa Romeo technical data.
- After repairs, reconnect, clear codes and verify repair by cycling ignition and tailgate several times and re-checking for stored faults.
Likely causes
- Wiring damage at tailgate hinge area where harness flexes
- Damaged connector where positive supply and sensor signal are adjacent
- Replacement sensor installed with incorrect wiring/pinout
- Water ingress causing corrosion and bridging between positive and signal pins
Fault status
Status
Tailgate anti-theft sensor circuit short to positive (B1497)
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
B1497
FIAT
B — Body
Tailgate anti-theft sensor circuit short to positive
Views:
UK: 4
EN: 5
RU: 4
AI status
Completed
Completed
100%
Causes
- Chafed or pinched wiring harness near tailgate/hinges causing insulation breach to a positive feed
- Corroded or damaged tailgate anti-theft sensor connector with positive feed contacting signal conductor
- Aftermarket accessories or recent repairs incorrectly connected to the tailgate wiring or power feed
- Internal short in the anti-theft sensor (sensor failure)
- Faulty BCM or ground point (rare)
Symptoms
- Fault/warning lamp for anti-theft/tailgate security illuminated
- Unable to arm/disarm tailgate anti-theft correctly
- Tailgate sensor shows constant triggered state or intermittent behavior
- Stored DTC B1497 in BCM memory
- Possible parasitic drain or blown fuse if a hard short exists
What to check
- Retrieve freeze frame and any related codes from BCM and security modules
- Visual inspection of tailgate wiring harness, especially at hinge and body-to-tailgate grommet
- Inspect tailgate anti-theft sensor connector for corrosion, bent pins, or melted plastic
- Check fuses and fusible links related to tailgate/BCM circuits
- Backprobe sensor connector and wiring with ignition ON and tailgate in known positions
- Perform wiggle test on harness while watching live data/voltage and checking for intermittent changes
Signal parameters
- Battery supply voltage (Vbatt) at harness: 11–14.5 V with ignition ON
- Sensor signal line expected: low voltage (near 0–1 V) when returned to ground by BCM or high-impedance when inactive — depends on vehicle design (consult Alfa Romeo wiring)
- With a short-to-positive fault the signal line will read ~Vbatt (≈11–14.5 V) at the sensor connector
- Resistance between signal line and battery positive for a hard short: very low (close to 0 ohm). Normal resistance should be high (kΩ to open) when circuit open
- Resistance from signal to ground normally should be high; a low resistance indicates unintended connection
Diagnostic algorithm
- Read and record fault(s) from BCM and any security modules. Note freeze-frame data and ignition state when fault set.
- Visually inspect tailgate area: harness grommet, hinge area, sensor connector, and route for chafing, corrosion or damage.
- With ignition ON, backprobe the sensor connector: measure voltage on the signal wire. If it reads battery voltage (~11–14.5 V), this confirms a short to positive condition at or upstream of the connector.
- Disconnect the tailgate anti-theft sensor connector. Clear codes, cycle ignition and operate tailgate. If B1497 does not return with the sensor disconnected, the sensor or its connector is likely at fault. If code returns, fault is in harness or BCM.
- If voltage indicates short and persists with connector disconnected, isolate wiring by disconnecting connectors progressively toward the BCM to find the shorted section. Pay special attention to sections that flex (hinge/bellow).
- Perform resistance checks (with battery disconnected): measure resistance between the signal wire and battery positive. Very low resistance indicates direct short. Also check resistance to ground and between neighboring wires for pin-to-pin shorts.
- Repair identified wiring damage (repair or replace section, use new grommets and protective sleeving). Clean or replace corroded connectors and re-pin if required.
- If wiring and connector are good but fault persists, test or replace the anti-theft sensor. If still unresolved, suspect BCM or module wiring and pursue module-level diagnostics or consult Alfa Romeo technical data.
- After repairs, reconnect, clear codes and verify repair by cycling ignition and tailgate several times and re-checking for stored faults.
Likely causes
- Wiring damage at tailgate hinge area where harness flexes
- Damaged connector where positive supply and sensor signal are adjacent
- Replacement sensor installed with incorrect wiring/pinout
- Water ingress causing corrosion and bridging between positive and signal pins
Fault status
Status
Tailgate anti-theft sensor circuit short to positive (B1497)
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
B1497
MITSUBISHI
B — Body
EEPROM
Views:
UK: 7
EN: 10
RU: 10
AI status
Completed
Completed
100%
Causes
- Chafed or pinched wiring harness near tailgate/hinges causing insulation breach to a positive feed
- Corroded or damaged tailgate anti-theft sensor connector with positive feed contacting signal conductor
- Aftermarket accessories or recent repairs incorrectly connected to the tailgate wiring or power feed
- Internal short in the anti-theft sensor (sensor failure)
- Faulty BCM or ground point (rare)
Symptoms
- Fault/warning lamp for anti-theft/tailgate security illuminated
- Unable to arm/disarm tailgate anti-theft correctly
- Tailgate sensor shows constant triggered state or intermittent behavior
- Stored DTC B1497 in BCM memory
- Possible parasitic drain or blown fuse if a hard short exists
What to check
- Retrieve freeze frame and any related codes from BCM and security modules
- Visual inspection of tailgate wiring harness, especially at hinge and body-to-tailgate grommet
- Inspect tailgate anti-theft sensor connector for corrosion, bent pins, or melted plastic
- Check fuses and fusible links related to tailgate/BCM circuits
- Backprobe sensor connector and wiring with ignition ON and tailgate in known positions
- Perform wiggle test on harness while watching live data/voltage and checking for intermittent changes
Signal parameters
- Battery supply voltage (Vbatt) at harness: 11–14.5 V with ignition ON
- Sensor signal line expected: low voltage (near 0–1 V) when returned to ground by BCM or high-impedance when inactive — depends on vehicle design (consult Alfa Romeo wiring)
- With a short-to-positive fault the signal line will read ~Vbatt (≈11–14.5 V) at the sensor connector
- Resistance between signal line and battery positive for a hard short: very low (close to 0 ohm). Normal resistance should be high (kΩ to open) when circuit open
- Resistance from signal to ground normally should be high; a low resistance indicates unintended connection
Diagnostic algorithm
- Read and record fault(s) from BCM and any security modules. Note freeze-frame data and ignition state when fault set.
- Visually inspect tailgate area: harness grommet, hinge area, sensor connector, and route for chafing, corrosion or damage.
- With ignition ON, backprobe the sensor connector: measure voltage on the signal wire. If it reads battery voltage (~11–14.5 V), this confirms a short to positive condition at or upstream of the connector.
- Disconnect the tailgate anti-theft sensor connector. Clear codes, cycle ignition and operate tailgate. If B1497 does not return with the sensor disconnected, the sensor or its connector is likely at fault. If code returns, fault is in harness or BCM.
- If voltage indicates short and persists with connector disconnected, isolate wiring by disconnecting connectors progressively toward the BCM to find the shorted section. Pay special attention to sections that flex (hinge/bellow).
- Perform resistance checks (with battery disconnected): measure resistance between the signal wire and battery positive. Very low resistance indicates direct short. Also check resistance to ground and between neighboring wires for pin-to-pin shorts.
- Repair identified wiring damage (repair or replace section, use new grommets and protective sleeving). Clean or replace corroded connectors and re-pin if required.
- If wiring and connector are good but fault persists, test or replace the anti-theft sensor. If still unresolved, suspect BCM or module wiring and pursue module-level diagnostics or consult Alfa Romeo technical data.
- After repairs, reconnect, clear codes and verify repair by cycling ignition and tailgate several times and re-checking for stored faults.
Likely causes
- Wiring damage at tailgate hinge area where harness flexes
- Damaged connector where positive supply and sensor signal are adjacent
- Replacement sensor installed with incorrect wiring/pinout
- Water ingress causing corrosion and bridging between positive and signal pins
Fault status
Status
Tailgate anti-theft sensor circuit short to positive (B1497)
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
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Code
B1497
Other
B — Body
Decklid Punch-Out Sensor Battery Short
Views:
UK: 15
EN: 18
RU: 15
AI status
Completed
Completed
100%
Causes
- Chafed or pinched wiring harness near tailgate/hinges causing insulation breach to a positive feed
- Corroded or damaged tailgate anti-theft sensor connector with positive feed contacting signal conductor
- Aftermarket accessories or recent repairs incorrectly connected to the tailgate wiring or power feed
- Internal short in the anti-theft sensor (sensor failure)
- Faulty BCM or ground point (rare)
Symptoms
- Fault/warning lamp for anti-theft/tailgate security illuminated
- Unable to arm/disarm tailgate anti-theft correctly
- Tailgate sensor shows constant triggered state or intermittent behavior
- Stored DTC B1497 in BCM memory
- Possible parasitic drain or blown fuse if a hard short exists
What to check
- Retrieve freeze frame and any related codes from BCM and security modules
- Visual inspection of tailgate wiring harness, especially at hinge and body-to-tailgate grommet
- Inspect tailgate anti-theft sensor connector for corrosion, bent pins, or melted plastic
- Check fuses and fusible links related to tailgate/BCM circuits
- Backprobe sensor connector and wiring with ignition ON and tailgate in known positions
- Perform wiggle test on harness while watching live data/voltage and checking for intermittent changes
Signal parameters
- Battery supply voltage (Vbatt) at harness: 11–14.5 V with ignition ON
- Sensor signal line expected: low voltage (near 0–1 V) when returned to ground by BCM or high-impedance when inactive — depends on vehicle design (consult Alfa Romeo wiring)
- With a short-to-positive fault the signal line will read ~Vbatt (≈11–14.5 V) at the sensor connector
- Resistance between signal line and battery positive for a hard short: very low (close to 0 ohm). Normal resistance should be high (kΩ to open) when circuit open
- Resistance from signal to ground normally should be high; a low resistance indicates unintended connection
Diagnostic algorithm
- Read and record fault(s) from BCM and any security modules. Note freeze-frame data and ignition state when fault set.
- Visually inspect tailgate area: harness grommet, hinge area, sensor connector, and route for chafing, corrosion or damage.
- With ignition ON, backprobe the sensor connector: measure voltage on the signal wire. If it reads battery voltage (~11–14.5 V), this confirms a short to positive condition at or upstream of the connector.
- Disconnect the tailgate anti-theft sensor connector. Clear codes, cycle ignition and operate tailgate. If B1497 does not return with the sensor disconnected, the sensor or its connector is likely at fault. If code returns, fault is in harness or BCM.
- If voltage indicates short and persists with connector disconnected, isolate wiring by disconnecting connectors progressively toward the BCM to find the shorted section. Pay special attention to sections that flex (hinge/bellow).
- Perform resistance checks (with battery disconnected): measure resistance between the signal wire and battery positive. Very low resistance indicates direct short. Also check resistance to ground and between neighboring wires for pin-to-pin shorts.
- Repair identified wiring damage (repair or replace section, use new grommets and protective sleeving). Clean or replace corroded connectors and re-pin if required.
- If wiring and connector are good but fault persists, test or replace the anti-theft sensor. If still unresolved, suspect BCM or module wiring and pursue module-level diagnostics or consult Alfa Romeo technical data.
- After repairs, reconnect, clear codes and verify repair by cycling ignition and tailgate several times and re-checking for stored faults.
Likely causes
- Wiring damage at tailgate hinge area where harness flexes
- Damaged connector where positive supply and sensor signal are adjacent
- Replacement sensor installed with incorrect wiring/pinout
- Water ingress causing corrosion and bridging between positive and signal pins
Fault status
Status
Tailgate anti-theft sensor circuit short to positive (B1497)
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
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